// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using Microsoft.DotNet.Cli.Utils;
using Microsoft.DotNet.Configurer;
using RuntimeEnvironment = Microsoft.DotNet.Cli.Utils.RuntimeEnvironment;
using RuntimeInformation = System.Runtime.InteropServices.RuntimeInformation;

namespace Microsoft.DotNet.Cli.Telemetry;

internal class TelemetryCommonProperties(
    Func<string> getCurrentDirectory = null,
    Func<string, string> hasher = null,
    Func<string> getMACAddress = null,
    Func<string> getDeviceId = null,
    IDockerContainerDetector dockerContainerDetector = null,
    IUserLevelCacheWriter userLevelCacheWriter = null,
    ICIEnvironmentDetector ciEnvironmentDetector = null)
{
    private readonly IDockerContainerDetector _dockerContainerDetector = dockerContainerDetector ?? new DockerContainerDetectorForTelemetry();
    private readonly ICIEnvironmentDetector _ciEnvironmentDetector = ciEnvironmentDetector ?? new CIEnvironmentDetectorForTelemetry();
    private readonly Func<string> _getCurrentDirectory = getCurrentDirectory ?? Directory.GetCurrentDirectory;
    private readonly Func<string, string> _hasher = hasher ?? Sha256Hasher.Hash;
    private readonly Func<string> _getMACAddress = getMACAddress ?? MacAddressGetter.GetMacAddress;
    private readonly Func<string> _getDeviceId = getDeviceId ?? DeviceIdGetter.GetDeviceId;
    private readonly IUserLevelCacheWriter _userLevelCacheWriter = userLevelCacheWriter ?? new UserLevelCacheWriter();
    private const string OSVersion = "OS Version";
    private const string OSPlatform = "OS Platform";
    private const string OSArchitecture = "OS Architecture";
    private const string OutputRedirected = "Output Redirected";
    private const string RuntimeId = "Runtime Id";
    private const string ProductVersion = "Product Version";
    private const string TelemetryProfile = "Telemetry Profile";
    private const string CurrentPathHash = "Current Path Hash";
    private const string DeviceId = "devdeviceid";
    private const string MachineId = "Machine ID";
    private const string MachineIdOld = "Machine ID Old";
    private const string DockerContainer = "Docker Container";
    private const string KernelVersion = "Kernel Version";
    private const string InstallationType = "Installation Type";
    private const string ProductType = "Product Type";
    private const string LibcRelease = "Libc Release";
    private const string LibcVersion = "Libc Version";

    private const string CI = "Continuous Integration";

    private const string TelemetryProfileEnvironmentVariable = "DOTNET_CLI_TELEMETRY_PROFILE";
    private const string CannotFindMacAddress = "Unknown";

    private const string MachineIdCacheKey = "MachineId";
    private const string IsDockerContainerCacheKey = "IsDockerContainer";

    public Dictionary<string, string> GetTelemetryCommonProperties()
    {
        return new Dictionary<string, string>
        {
            {OSVersion, RuntimeEnvironment.OperatingSystemVersion},
            {OSPlatform, RuntimeEnvironment.OperatingSystemPlatform.ToString()},
            {OSArchitecture, RuntimeInformation.OSArchitecture.ToString()},
            {OutputRedirected, Console.IsOutputRedirected.ToString()},
            {RuntimeId, RuntimeInformation.RuntimeIdentifier},
            {ProductVersion, Product.Version},
            {TelemetryProfile, Environment.GetEnvironmentVariable(TelemetryProfileEnvironmentVariable)},
            {DockerContainer, _userLevelCacheWriter.RunWithCache(IsDockerContainerCacheKey, () => _dockerContainerDetector.IsDockerContainer().ToString("G") )},
            {CI, _ciEnvironmentDetector.IsCIEnvironment().ToString() },
            {CurrentPathHash, _hasher(_getCurrentDirectory())},
            {MachineIdOld, _userLevelCacheWriter.RunWithCache(MachineIdCacheKey, GetMachineId)},
            // we don't want to recalcuate a new id for every new SDK version. Reuse the same path across versions.
            // If we change the format of the cache later.
            // We need to rename the cache from v1 to v2
            {MachineId,
                _userLevelCacheWriter.RunWithCacheInFilePath(
                    Path.Combine(
                        CliFolderPathCalculator.DotnetUserProfileFolderPath,
                        $"{MachineIdCacheKey}.v1.dotnetUserLevelCache"),
                    GetMachineId)},
            {DeviceId, _getDeviceId()},
            {KernelVersion, GetKernelVersion()},
            {InstallationType, ExternalTelemetryProperties.GetInstallationType()},
            {ProductType, ExternalTelemetryProperties.GetProductType()},
            {LibcRelease, ExternalTelemetryProperties.GetLibcRelease()},
            {LibcVersion, ExternalTelemetryProperties.GetLibcVersion()}
        };
    }

    private string GetMachineId()
    {
        var macAddress = _getMACAddress();
        if (macAddress != null)
        {
            return _hasher(macAddress);
        }
        else
        {
            return Guid.NewGuid().ToString();
        }
    }

    /// <summary>
    /// Returns a string identifying the OS kernel.
    /// For Unix this currently comes from "uname -srv".
    /// For Windows this currently comes from RtlGetVersion().
    ///
    /// Here are some example values:
    ///
    ///     Alpine.36        Linux 4.9.60-linuxkit-aufs #1 SMP Mon Nov 6 16:00:12 UTC 2017
    ///     Centos.73        Linux 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017
    ///     Debian.87        Linux 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1+deb8u2 (2017-03-07)
    ///     Debian.90        Linux 4.9.0-2-amd64 #1 SMP Debian 4.9.18-1 (2017-03-30)
    ///     fedora.25        Linux 4.11.3-202.fc25.x86_64 #1 SMP Mon Jun 5 16:38:21 UTC 2017
    ///     Fedora.26        Linux 4.14.15-200.fc26.x86_64 #1 SMP Wed Jan 24 04:26:15 UTC 2018
    ///     Fedora.27        Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19 13:19:54 UTC 2018
    ///     OpenSuse.423     Linux 4.4.104-39-default #1 SMP Thu Jan 4 08:11:03 UTC 2018 (7db1912)
    ///     RedHat.69        Linux 2.6.32-696.20.1.el6.x86_64 #1 SMP Fri Jan 12 15:07:59 EST 2018
    ///     RedHat.72        Linux 3.10.0-514.21.1.el7.x86_64 #1 SMP Sat Apr 22 02:41:35 EDT 2017
    ///     RedHat.73        Linux 3.10.0-514.21.1.el7.x86_64 #1 SMP Sat Apr 22 02:41:35 EDT 2017
    ///     SLES.12          Linux 4.4.103-6.38-default #1 SMP Mon Dec 25 20:44:33 UTC 2017 (e4b9067)
    ///     suse.422         Linux 4.4.49-16-default #1 SMP Sun Feb 19 17:40:35 UTC 2017 (70e9954)
    ///     Ubuntu.1404      Linux 3.19.0-65-generic #73~14.04.1-Ubuntu SMP Wed Jun 29 21:05:22 UTC 2016
    ///     Ubuntu.1604      Linux 4.13.0-1005-azure #7-Ubuntu SMP Mon Jan 8 21:37:36 UTC 2018
    ///     Ubuntu.1604.WSL  Linux 4.4.0-43-Microsoft #1-Microsoft Wed Dec 31 14:42:53 PST 2014
    ///     Ubuntu.1610      Linux 4.8.0-45-generic #48-Ubuntu SMP Fri Mar 24 11:46:39 UTC 2017
    ///     Ubuntu.1704      Linux 4.10.0-19-generic #21-Ubuntu SMP Thu Apr 6 17:04:57 UTC 2017
    ///     Ubuntu.1710      Linux 4.13.0-25-generic #29-Ubuntu SMP Mon Jan 8 21:14:41 UTC 2018
    ///     OSX1012          Darwin 16.7.0 Darwin Kernel Version 16.7.0: Thu Jan 11 22:59:40 PST 2018; root:xnu-3789.73.8~1/RELEASE_X86_64
    ///     OSX1013          Darwin 17.4.0 Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64
    ///     Windows.10       Microsoft Windows 10.0.14393
    ///     Windows.10.Core  Microsoft Windows 10.0.14393
    ///     Windows.10.Nano  Microsoft Windows 10.0.14393
    ///     Windows.7        Microsoft Windows 6.1.7601 S
    ///     Windows.81       Microsoft Windows 6.3.9600
    /// </summary>
    private static string GetKernelVersion()
    {
        return RuntimeInformation.OSDescription;
    }
}
